%I
%S 5,2,3,4,5,3,5,4,6,5,7,4,7,6,3,8,7,6,5,4,6,8,7,6,5,6,8,4,7,6,9,8,7,6,
%T 5,9,8,7,6,8,7,6,11,4,5,10,9,6,7,10,9,8,7,6,5,7,13,12,11,10,9,8,7,8,7,
%U 6,13,12,11,5,9,8,7,6,9,8,7,12,11,10,9,8,7,6,11,10,9,8,11,6,7,4,12,11,5
%N Smallest k such that n+k divides (k+1)!k!.
%o (PARI) a(n) = {k = 1; while (((k+1)!  k!) % (n+k), k++); k;} \\ _Michel Marcus_, Nov 26 2013
%K easy,nonn
%O 1,1
%A _Benoit Cloitre_, May 30 2002
